#include <iostream>
using namespace std;
class RationalNumber
{
	int m_numerator;
	int m_denominator;
public:
	RationalNumber(int numerator = 0,int denominator = 0);
	~RationalNumber();
	friend RationalNumber Add(RationalNumber& plus1,RationalNumber& plus2);
	friend RationalNumber Subtract(RationalNumber& sub1,RationalNumber& sub2);
	friend RationalNumber Multiply(RationalNumber& mult1,RationalNumber& mult2);
	friend RationalNumber Divide(RationalNumber& div1,RationalNumber& div2);
};
RationalNumber::RationalNumber(int numerator = 0,int denominator = 0)
{
	m_numerator = numerator;
	m_denominator = denominator;
}
RationalNumber Add(RationalNumber& plus1,RationalNumber& plus2){
	RationalNumber temporary;
	return 
}
RationalNumber Subtract(RationalNumber& sub1,RationalNumber& sub2)
RationalNumber Multiply(RationalNumber& mult1,RationalNumber& mult2)
RationalNumber Divide(RationalNumber& div1,RationalNumber& div2)